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COMMITMENTS AND CONTINGENCIES (Tables)
12 Months Ended
Dec. 31, 2017
CONTINGENCIES [Abstract]  
Lease commitments
The Company leases office premises, educational facilities and various equipment for varying periods through the year 2030 at basic annual rentals (excluding taxes, insurance, and other expenses under certain leases) as follows:

Year Ending December 31,
 
Operating
Leases
 
2018
 
$
19,347
 
2019
  
16,608
 
2020
  
12,386
 
2021
  
8,185
 
2022
  
6,022
 
Thereafter
  
15,860
 
   
78,408
 
Less amount representing interest
  
-
 
  
$
78,408